INFO: task syz.1.1691:13325 blocked for more than 143 seconds.
Not tainted 6.13.0-rc7-syzkaller-00160-gad26fc09dabf #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1691 state:D stack:26608 pid:13325 tgid:13318 ppid:5832 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
nfsd_nl_rpc_status_get_dumpit+0xb1/0x1160 fs/nfsd/nfsctl.c:1558
genl_dumpit+0x122/0x230 net/netlink/genetlink.c:1027
netlink_dump+0x53c/0xd00 net/netlink/af_netlink.c:2317
__netlink_dump_start+0x6d9/0x980 net/netlink/af_netlink.c:2432
genl_family_rcv_msg_dumpit+0x1e1/0x2e0 net/netlink/genetlink.c:1076
genl_family_rcv_msg net/netlink/genetlink.c:1192 [inline]
genl_rcv_msg+0x470/0x800 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2542
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1347
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1891
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg net/socket.c:726 [inline]
____sys_sendmsg+0x9ae/0xb40 net/socket.c:2583
___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
__sys_sendmsg+0x16e/0x220 net/socket.c:2669
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7efdd85d29
RSP: 002b:00007f7efec02038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7efdf76080 RCX: 00007f7efdd85d29
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000005
RBP: 00007f7efde01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7efdf76080 R15: 00007ffd74c9caf8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
2 locks held by kworker/u8:5/69:
#0: ffff8881456ac148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3211
#1: ffffc9000217fd80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3212
4 locks held by udevd/5206:
1 lock held by syz-executor/5823:
2 locks held by kworker/u8:15/6761:
4 locks held by kworker/u8:21/6770:
#0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3211
#1: ffffc90018a8fd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3212
#2: ffffffff8faaa7d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbb/0xbd0 net/core/net_namespace.c:602
#3: ffffffff8ddc6540 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x48/0x700 kernel/rcu/tree.c:4565
2 locks held by syz-executor/12150:
#0: ffff888034a780e0 (&type->s_umount_key#50){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888034a780e0 (&type->s_umount_key#50){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888034a780e0 (&type->s_umount_key#50){+.+.}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1bb5c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by getty/12296:
#0: ffff888030d150a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000fee32f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
2 locks held by syz.1.1691/13320:
#0: ffffffff8fb5f710 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1bb5c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1964
3 locks held by syz.1.1691/13325:
#0: ffffffff8fb5f710 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffff8880300de6c8 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: __netlink_dump_start+0x154/0x980 net/netlink/af_netlink.c:2396
#2: ffffffff8e1bb5c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_rpc_status_get_dumpit+0xb1/0x1160 fs/nfsd/nfsctl.c:1558
2 locks held by syz-executor/13798:
#0: ffff88807d2160e0 (&type->s_umount_key#50){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807d2160e0 (&type->s_umount_key#50){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807d2160e0 (&type->s_umount_key#50){+.+.}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1bb5c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
1 lock held by syz-executor/14405:
#0: ffffffff8ddc6678 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
1 lock held by syz-executor/14411:
1 lock held by syz-executor/14413:
#0: ffffffff8ddc6678 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
2 locks held by syz.1.1891/14957:
2 locks held by syz.4.1896/15001:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.13.0-rc7-syzkaller-00160-gad26fc09dabf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xf14/0x1240 kernel/hung_task.c:397
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 15188 Comm: dhcpcd-run-hook Not tainted 6.13.0-rc7-syzkaller-00160-gad26fc09dabf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xc/0x70 kernel/kcov.c:217
Code: cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 f4 8b 6a 7e <65> 8b 05 f5 8b 6a 7e a9 00 01 ff 00 48 8b 34 24 74 1d f6 c4 01 74
RSP: 0000:ffffc900039679e8 EFLAGS: 00000286
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11003594e01
RDX: ffff88801c7fbc00 RSI: 0000000000000000 RDI: ffff888034640040
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000045f40
R10: ffffffff969b9cc7 R11: 0000000000000003 R12: ffff888034640040
R13: ffff88801beec730 R14: ffff88801beec000 R15: 000000000002d5c0
FS: 00007f1ae6b7c380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1ae6dabb10 CR3: 000000002602e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
cgroup_rstat_updated+0x2a/0xb20 kernel/cgroup/rstat.c:87
memcg_rstat_updated mm/memcontrol.c:582 [inline]
__mod_memcg_lruvec_state+0x224/0x750 mm/memcontrol.c:766
__mod_lruvec_state mm/memcontrol.c:789 [inline]
__lruvec_stat_mod_folio+0x2b9/0x360 mm/memcontrol.c:809
__folio_mod_stat+0x5f/0x230 mm/rmap.c:1301
folio_add_new_anon_rmap+0x3ba/0x1980 mm/rmap.c:1477
wp_page_copy mm/memory.c:3434 [inline]
do_wp_page+0x15d1/0x4670 mm/memory.c:3759
handle_pte_fault mm/memory.c:5817 [inline]
__handle_mm_fault+0x1ade/0x2a40 mm/memory.c:5944
handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6112
do_user_addr_fault+0x60d/0x13f0 arch/x86/mm/fault.c:1338
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f1ae6c821fc
Code: 3d fd db 0e 00 e9 54 fd ff ff 4d 39 c6 75 7f 80 7c 24 2e 00 74 78 48 39 55 68 75 72 48 39 44 24 08 73 6b 48 8d 0c 1a 48 29 d8 <48> 89 4d 70 48 89 4d 78 48 89 4d 68 4c 89 71 10 4c 89 71 18 48 3d
RSP: 002b:00007ffc5ef625f0 EFLAGS: 00010206
RAX: 00000000000000f0 RBX: 0000000000000020 RCX: 000055f70d76dc50
RDX: 000055f70d76dc30 RSI: 000055f70d76dd40 RDI: 000055f70d76c010
RBP: 00007f1ae6dabaa0 R08: 00007f1ae6dabb00 R09: 00007f1ae6dabb10
R10: 0000000000000010 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: 00007f1ae6dabb00 R15: 0000000000000020